1.1 Earth's Crust in Motion

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Vocabulary

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Geologists: scientists who study the forces that make and shape the earth
Geology: the study of planet Earth
Constructive forces: forces that build up landmasses like mountains
Destructive forces: forces that slowly wear away mountains and surface such as what an ocean does
Continents: seven large landmasses on earth
Seismic waves: waves that move through the Earth's interior
Pressure: force pushing on a surface or area
Cust: layer of rock that makes up the Earth's outer skin
Granite: rock with larger crystals that is less dense than basalt and makes up the continental crust
Mantle: layer of hot rock below the crust
Lithosphere: means "stone" and is the mantle and crust together
Asthenosphere: means "weak" soft rock material that can flow slowly
Outer Core: layer of molten metal that surrounds the inner core
Inner Core: dense ball of solid metal

Outline

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Science of Geology

• Studying surface changes
  • Surface always changing
• Finding indirect evidence
  • Cannot see inside earth
  • Use seismic waves
    • Speed of waves tells the material

Center of the Earth

• Temperature
  • Surface rock is cool
  • 20 meters/warmer
  • Every 40 meters 1 degree celsius hotter
    • Boy that's hot
• Pressure
  • Deeper you the greater the pressure

The Crust

• Continental
  • Granite
    • Light colored rock
• Oceanic
  • Basalt

The Mantle

• The mantle is a layer of hot rock
  • The uppermost part of the mantle and the crust makes the lithoshere

The Core

• The core has two layers
  • The two layers are the inner and the outer core

Earth's Magnetic Field

• The earth has two poles, the north and the south pole
  • Those poles act like a giant bar magnet